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Re: 2017 FORD SUPER DUTY NOT COLD AT IDLE
Posted to HVAC Forum on 8/15/2023

This is likely a fan clutch problem. The first clue is it cools good on the highway. What you will see is the A/C pressure will be high in the scanner. You can get a digital laser tachometer to measure the rpm of the fan for $20. The easiest would be to co... Login to read more.